初始提交：terminalX 可运行态（M0/M1/M1.5 已真机验证）

- M0: libghostty SSH 终端（渲染/输入/连接）+ 白屏修复(OutputGate) + 会话状态机/自动重连
- M1: tsnet 用户态组网 + SSH-over-tsnet(fd 桥)，shell 级真机验证；R5(Go+gvisor+C+++Swift 同进程) retire
- M1.5: tmux -CC 原生 tab（MVP）
- 结构: packages/(TXCore·TXTransport), apps/TerminalX, vendor/(libghostty-spm/libssh2/mbedtls/tsnet-bridge), artifacts/
- 文档: CLAUDE.md + docs/HANDOFF.md（新会话入口）
- 环境: 认证代理→依赖 vendor 本地化；Go 在 ~/.local/go；仅模拟器/未签名
- 待续: M2 mosh, tmux 多 pane, M4 安全(host key/SE)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

vendor/libghostty-spm/Sources/GhosttyTerminal/Platform/UIKit/TerminalInputBarKey.swift

@@ -0,0 +1,55 @@
+//
+//  TerminalInputBarKey.swift
+//  libghostty-spm
+//
+
+#if canImport(UIKit) && !targetEnvironment(macCatalyst)
+    public enum TerminalInputAccessoryItem: Equatable, Sendable {
+        case esc
+        case ctrl
+        case alt
+        case command
+        case tab
+        case arrowLeft
+        case arrowUp
+        case arrowDown
+        case arrowRight
+        case symbol(String)
+        case paste
+        case divider
+
+        public static let defaultItems: [TerminalInputAccessoryItem] = [
+            .esc,
+            .tab,
+            .ctrl,
+            .alt,
+            .command,
+            .divider,
+            .arrowLeft,
+            .arrowUp,
+            .arrowDown,
+            .arrowRight,
+            .divider,
+            .symbol("|"),
+            .symbol("/"),
+            .symbol("~"),
+            .symbol("-"),
+            .symbol("_"),
+            .symbol("`"),
+            .symbol("'"),
+            .symbol("\""),
+            .paste,
+        ]
+    }
+
+    enum TerminalInputBarKey {
+        case esc
+        case tab
+        case arrowLeft
+        case arrowUp
+        case arrowDown
+        case arrowRight
+        case symbol(String)
+        case paste
+    }
+#endif